Enya .45 differences

[Ed Carlaw]

I posted this in the engine tips section but thought I would post it here also. Can anyone tell me the differences between the Enya Model 6001 .45 and the Enya Model 6002 .45II engines. Just wanting to know if there are any significant differences between the two. Thanks, Ed.

[Bill Morell]

The 6001 has stunt friendly timing that runs very similar to a ST 46. The 6002 has a R/C set up type of run.

[Ed Carlaw]

Thanks Bill. I have two 6001's, one with the venturi built into the case and one with a separate bolt through type. The 6002 has a carb on it and the front case looks a little beefier. Ed.

[Bill Morell]

The one you are describing with the cast venturi needs to have a restrictor in place to get the stunt run. I'm also assuming that is the plain bearing version?

[Martin Quartim]

The 45 6001 has  a low compression head and won´t match ST G21-46 performance.   Now, if you replace the head with the Enya 45 6002 one, then it will match the same performance.

Very smooth engine!  Here I fly at D.Alt averaging 4.000ft, and my 45 6001 with the 6002 head 7.5mm venturi, 4mm NVA, works with 10% nitro in 4-2-4 with a Xoar 12x6 or 11x7 wood electric prop with a Pathfinder 620sq.inch wing

I have been using Xoar electric props even with my 4Stroke engines with no problems for many years, just need to be careful when starting the engine. Most experts took their time to make their wood props thinner, the Xoar wood electric is ready to go!

By the way the Head of the ST G21 46 will fit perfectly the Enya 45 6001 and 6002 and vice versa.

Also the Enya 45 6001 works best with 80/20 synth/castor. My fuel of preference, was stock Byron 10/20. I totally disliked using all castor fuel with this engine. It is an very old engine, but a very good one!



Martin

[Ed Carlaw]

Yes it's a plain bearing version. Haven't measured the size of the venturi yet. Ed.

[Martin Quartim]

Yes it's a plain bearing version. Haven't measured the size of the venturi yet. Ed.

The 45 6001 plain bearing, is a different animal, it has an Iron Piston instead of Aluminum Piston with ring.  There is an article about this engine "The Mighty Enya 45",

https://www.supercoolprops.com/articles/f2benya.php

I have them, but I did not have a chance to use one yet.  What  I wrote above is for the Enya 45 6001 with 2 BB Aluminum Piston with Ring so nothing applies to this engine, may be  the heads are compatible.  I normally call the 45 6001 plain bearing with Iron Piston,  just Enya 45S.


Martin

[Ed Carlaw]

I have both of the model 6001's and a couple of the 6002's.  Disregarding the older 45S if I swap the head from a 6002 to the 6001 are the issues with the conrod or crank because of the higher compression?

[Martin Quartim]

I have both of the model 6001's and a couple of the 6002's.  Disregarding the older 45S if I swap the head from a 6002 to the 6001 are the issues with the conrod or crank because of the higher compression?

No issue whatsoever with the head swapping.

The 45 6002 has a higher internal volume to let Air/Fuel pass, só it is stronger, but to fill in this volume you just need to use a higher rpm to make the mixture move faster inside. I am quite sure the 6002 will do nice 4-2-4 also but at higher rpm than the 6001.  I don´t have 6002 here but I believe the timing are about the same. 

I tried many mufflers with my Enya 45 6001 BB, and the best one was with a Dubro Muff-L-Air, it produce a nice low frequency grunt at 7800rpms.  The original muffler made the engine run very strange! Use with caution!

https://www.ebay.com/itm/385545959760?hash=item59c4547950:g:5AAAAOSwwIVkOI1V&amdata=enc%3AAQAIAAAAwPWDNojUSd2sOzYqKytYireqyxz%2BpvO%2FLcS0rDPfaegWkSOZHRZ0D6HbCdZ766wQ00RW4lrZ2VrDn0rvoSR0Xz10gEbjvmJXgYrluxQsDswq0DYAACT9z%2BdfQKbTAj6ts84%2FQXsvedZIftEoSMO6x1FaHLD1CmdewdrnBoA%2BSGaO1GGwCSX003ws7yM2wcrqmAyac84oad71Zs30Y1%2BwdgBFc1kKpwIss%2BtwLlKPFyCI4NiFGg044eWWsV73DTJHDQ%3D%3D%7Ctkp%3ABk9SR_6x1oq3Yg


Martin

[Martin Quartim]

I also liked  Randy´s Tube muffler with it, very low noise. Too bad there are no more of them!

Martin

[Ed Carlaw]

Thanks for the info. I think I have a Muff-L-Air floating around the shop somewhere. Great article on the .45. Thanks, Ed.

[Brian Hampton]

Just for info, there are two versions of the original 6001 45BB. The first version has two rings while the later one has a single ring. The single ring started being used when the 60IIIB arrived in about '72 with its single ring.

I have a twin ring 6001 which I used for many years and it was flawless, and yes, I used straight 80/20 all castor although every year or so I'd clean out the carbon build up. One time at a competition the then current Aussie champion asked me how I got my Enya to run just like his ST 46. I had no real answer because the Enya was stock standard so I was surprised he even asked. Years later the 6002 45-II arrived so I bought one to replace the 6001. I didn't like it at all, mainly because its running characteristics were totally unlike what I was used to so I shelved it.

The 6002 has a heavier and strengthened crankcase with a slightly shorter stroke (from 19.2mm to 19mm) but the same bore as the 6001 so the heads are obviously interchangeable but the capacity is reduced from 7.5cc to 7.42cc. I've never got around to checking either of them to see if there's any difference to timing so I must do that sometime.

[M Spencer]

 

On this , and one on the Hurricane 30 ( Hara ) it looks like Jetstreams on the Enya 45 s . Read theyd used OS mufflers , but assumed were 703s . ( Oct 1980 Aeromodelor cover - Looks like the same - Hara )

Most of the pictures theyve cunningly concealed the mufflers . dosnt look like the restrictor rings in there . belowisa 1980 , Foist wasser 1974 . from https://www.flickr.com/photos/fesselflug/albums THANKYOU .

[Martin Quartim]

It is very hard to find the  1 ring version, the crank is better made and the piston is of higher silicon content.

Martin

[Ian Hewitt]

I have two of the single ring 6001s - the crank has a different counterwieght design and the shaft port is bigger.

I haven't run then enough to figure out whether they show any differences in the air.

They all need quite a lot of running in before giving their best. I struggled to get a consistent run until I adopted a 6.5mm choke following advice from a UK flyer.

I think that they sound great - even on the ENYA muffler!

Ian